Boot device not found / no os installed

‎03-22-201912:17 AM

Product: HP laptop 15t-Bs0xx

Operating System: Microsoft Windows 10 (64-bit)

I dropped a book on my laptop and now when I try to start it I get a message saying operating system not found I’ve tried taking out and putting back in what I think is the hdd (I’m not very good with computers) and when I do the hard drive check it says no hard drive found

Boot device not found / no os installed

‎03-25-201910:43 AM

After I put the ssd back in all I get is a black screen. I did a diagnostics and it said short dst check failed. After a while of waiting it shows preparing automatic repair then does nothing. If I do have to buy a new ssd could you recommend some for me to purchase. Also I hard HP had some kind of part exchange could you explain how that works and if it is applicable to my situation. Thank you